Duplicator



Dec. 23, 1924. 1,520

C SHILLITTO ET AL DUPL CATOR Filed Jan, 22. 1924 Rae/260118 Patented Dec. 23, 1924.

UNITED STATES PATENT OFFICE.

CHARLES SHILLITTO AND ARTHUR JAMES HARDY, F ELTHAM, LONDON, ENGLAND.

DUPLICATOB.

Application filed January 22 1924.

To all whom it may concern:

Be it known that we, CI-IAnLns SnrLLrrro and ARTHUR JAMES HARDY, subjects of the Kin of Great Britain and Ireland, and both residing at 6 Prince John Road, Eltham, London, England, have invented a new and useful Duplicator, of which the following is a specification.

This invention relates to a duplicating or stencilling device for use with wax or stencil sheets and has for its object to provide an improved device of this character.

According to the invention, the device comprises an arcuate plate adapted to carry a stencil or wax sheet and a layer of absorbent material charged with impregnating substance, such absorbent material being engaged upon its upper surface by a roller member which is resiliently pressed against the arcuate Plate. D

In the preferred embodiment of our 1nvention, the arcuate plate comprises a sheet. of metal or metal alloy, preferably zinc, perforated by small perforations over the major part of its surface, and curved to constitute a segment of a circle. The roller member referred to in the preceding paragraph is engaged or carried by a bracketconstituting a linear extension of a handle adapted to be grasped by the operator, such handle being pivotally supported at a point constituting the axis of the segmental plate whereby engagement of the roller member with the segmental plate is always assured. The roller member is maintained pressed tightly against the segmental plate by a coiled spring located within said linear extension and disposed about a shank slidable within such extension and secured to the bracket carrying the roller member, or by a plurality of springs disposed between a lineally fixed bracket and a lineally movable bracket carrying the roller member. The segmental plate is provided with securing means at its extremities whereby stencil or wax sheets may be secured upon its lower face, a layer of material coated with ink or other impregnating substance being interposed between such stencil or wax sheet and the segmental plate.

In order to describe more clearly the nature of our invention the same is described by aid of the accompanying sheet of drawings, illustrating the embodiment described in the preceding paragraph, in which Fig. 1 is a side elevational view of the Serial No. 687,795.

device, parts of which are shown broken away for clearness.

Fig. 2 is a sectional end elevation, and

Figs. 3 and 4 are broken bi-sectional de tail views illustrating two means of resiliently supporting the roller member.

Referring to the drawings, the handle by which the device is held by the operator represented by the numeral 1 and is shown broken for the purpose of saving space in the drawings. The curved metal plate, to which a wax sheet or stencil is adapted to be attached is represented by the numeral 2 and is shown as curved to a true segmental surface and pivotally-connected to the handle 1, such pivotal connection being effected by segmental side plates secured at their peripheries to the curved plate 2 and apertured in alignment at their axial point for the reception of a bolt or pin a whereby they are pivotally connected to the handle, such pin or bolt passing through the handle 1. It will be apparent however that for lightness radial arms may be provided instead of the side plates 3, or the side plates may be slotted or otherwise perforated. These plates 3 are cranked inwards towards the handle to compensate for the diiference'in widths of the said handle and the plate 2, but of course this may be obviated if desired by making the pin 4 sub-- st-antially the same widthas the plate'2.

The extremities of the plate 2 are provided with means for securing a layerv of material charged with ink or other impregnating substance, and a stencil or wax sheet, the layer of material referred to bcing interposed between the stencil and the plate 2. In the embodiment illustrated this securing means is provided by bending over the ends of the plate 2 each in the form of a crook to provide spring clips 5 over and under which are passed the ends of the stencil or wax sheet.

To ensure an even and constant pressure upon the plate 2, a roller 6 is provided connected to the handle 1 and engaging the upper face of the plate 2. This roller is engaged or carried by a bifurcated bracket 7, preferably the extremities of the bifurca tions of such bracket having semi-circular cut-away portions which rest upon curved axial extensions 8 of a pin carried by the roller 6. This bracket 7 is slidably accommodated in a channelled bracket 9 (Figs. 1, 2 and 3) which is secured by a screw 10 to ltltl the lower end of the handle 1 so that both 01" said brackets form lineal extensions of the handle 1. To effect the requisite pressure of the roller upon the plate 2 coiled springs 11 are interposed between the two brackets 7 and 9, such springs preferably being disposed about pins 12 carried by the bracket 7. As an alternative to these coiled springs a curved leaf spring may equally well be interposed between the two brackets. The bolt or pin 1 is preferably surrounded by a bush 13 (Fig. 3) or a pair of bushes 14 (Fig. 4) to prevent it from wearing into the handle 1'.

In Fig. 4 is illustrated a modified means of resiliently supporting the roller 6, such modification doing away with the necessity of the channelled bracket 9, the bracket 7 carrying a central Vertical shank 15 slidable within the handle 1 and having a coiled spring 15 disposed about it, such coiled spring being accommodated with an aperture 16 in the lower end of the handle. The shank 15 is slotted at 17 to allow the bolt or pin 4 to pass therethrough and to allow a certain amount of lineal movement of such pin.

Preferably the plate 2 is perforated over the major portion of its surface so that impregnating material will pass therethrough and consequently not flow out from the edges of such plate and disfigure the surface being marked.

We claim 1. A duplicating or stencilling device comprising an arcuate plate adapted to carry a stencil or wax sheet and a layer of ab sorbent material, such plate having associated with it a roller located above its upper surface and adapted to effect the requisite pressure for feeding impregnating substance with which the absorbent material is adapted to be charged through the cut away portions of the stencil or wax sheet.

2. .A duplicating or stencilling device.

comprising an arcuate plate adapted to carry a stencil or wax sheet and a layer of material charged with impregnating substance such plate having pivotally connected to it a handle to which is resiliently connected a roller adapted to eflect pressure upon the arcuate plate.

3. A duplicating or stencilling device comprising a sheet of metal having-an arcu ate surface and provided with means at its extremities whereby a stencil or wax sheet and a layer of absorbent material may be secured thereto, such plate carrying a pair of upstanding side members which support pivotally a handle, and means for effecting pressure upon said plate interposed between such plate and said handle.

4. A duplicating or stencilling device comprising an arcuate plate adapted to carry a stencil or wax sheet and a layer of abterial chargedwith impregnating substance.

such plate carrying a pair of upstanding side members which carry a spindle or pin upon which is pivotally supported a handle, such handle accommodating slidably an-extension carried by a bracket supporting a roller adapted to effect pressure upon said plate, suchiextension having disposed about it a spring interposed between said bracket and said handle.

CHARLES SHILLITTO. ARTHUR JAMES HARDY. 

